设计与实现一个小型绘图板软件系统，要求具有方便的图形用户界面，包括标题栏、菜单栏、工具栏，菜单栏有相关的菜单和菜单项，有快捷键，具有编辑、打开、保存和各种绘图功能（详细功能要求通过运行提供的字节码文件来确定。-Design and implementation of a small drawing board software system, requires a convenient graphical user interface, including the title bar, menu bar, toolbar, menu bar with menus and menu items associated with shortcut keys, with editing, open, save, and each kind of drawing functions (detailed functional requirements provided by running bytecode file to determine.